Improvement in mills for grinding sugar-cane



T. L. ROBERTS. MILL'POR GRINDING SUGAR GANE.

No. 52,207. 'Patented'.m. 2s, 1866.

the usual manner.

UNITED STATES PATENT OFFICE.

THOMAS L. ROBERTS, OE'INDIANAPOLIS, INDIANA.

IMPROVEMENT IN MILLS FOR GRINDING SUGAR-CANE.

Specication forming part of Letters Patent No. 52,207, dated January 23, 1866.

and useful VImprovements in Sugar-Mills, of

which-the following is a full and exact description, reference being had to the accompanying drawings and the letters marked thereon.

Figure 1 is a longitudinal section showing the mill cnt verticallythrough the center, except the gearing and upright and large rollershaft, which are shown in full. Fig. 2 is'an elevation showing the end plate or roll-frame.

Fig. 3 is an end view showing the rolls and scraper with set-plate tor-adjusting the same. Fig. 4 isa side view of the top roll as it appears when lifted out of the frame.

A is the frame which supports the main shaft B, to which the master-wheel 0,' which gears with the pinion D. The endplates, E, support the rolls, and are so construct-ed as to receive the journal-boxes F through the top opening, Gr. The boxes F are heldin place by the keys H, which operate through the keyways J. The handles lt are screwed or attached to the boxes'F, and are used to lift the top rollout of the frame when necessary. I are set-screws, designed to hold the bottom rolls in contact with the middle or top roll,

4operating against the boxes K, which are allowed to slide laterally in the end plates, E. The scraper S is constructed with bed-plate L, which has the journals M to extend through the end plates, E, and operate in the notch P ofthe set-plate 0. The set-plate O is held in place by means of the set-screw N, which attaches it at the required position, holding it firmly to the end plate, E, while the journals yoperate through the slot T.

The following is the operation of the mill: The -master-wheel C beingrevolved gives motion to the pinion D, whichbeing attached to the top roll-shaft, gives motion to the mill in l/Vhen anything occurs to cause an examination of the interior of the mill necessary for the purpose of cleaning or otherwise, the keys H are taken out from the slot or key-seats J. The top roll is then lifted out by means of the handles R, along with the gearingwhich-v is attached. By this arrangement the machine is much more portable than other machines. The master-wheel may also be removed by simply removing. the box V, when themill-frame and the two remaining rolls may be handled with comparative ease and without deranging the frame of the machine. The scraper Sis adjusted to lit and thoroughly scrape the roll, and as it wears it is moved over to the roll by means ot' the set' plate, which, as it is moved over, carries .the journal M of the scraper S in the notch P. The set-.screw N, passing through the slot in the set-plate O, holds'it rmly against the end plates, E.

The advantages of the mill being so constructed that the top roll may be lifted out and access had to the space between the rolls will be readily understood from the factthat a substance is allowed to accumulate while the' cane is being ground, which, if allowed to remain, will sour and rust the mill, besides the fact of cleanliness', which it is important to consider.

The advantages OI tue scraper consist in its durability and the simplicity and readiness with which it is adjusted to nt the rolls as it wears and the elasticity of its bearing upon the roll.

What I claim, and desire to secure by Let- 

